\documentclass[]{article}
\setlength{\pdfpagewidth}{8.5in} \setlength{\pdfpageheight}{11in}
\begin{document}
\begin{tabular}{lc} \hline
 & (1) \\\
 & ROB2 \\\
VARIABLES & gr\_pop \\\ \hline
 &  \\\
p1871cotshr & -0.146** \\\
 & (0.0677) \\\
p1881cotshr & 0.0495 \\\
 & (0.0776) \\\
p1891cotshr & 0.0528 \\\
 & (0.107) \\\
p1901cotshr & -0.0717 \\\
 & (0.127) \\\
p1871otexshr & 0.222 \\\
 & (0.164) \\\
p1881otexshr & 0.231** \\\
 & (0.0874) \\\
p1891otexshr & 0.255*** \\\
 & (0.0695) \\\
p1901otexshr & 0.213** \\\
 & (0.0848) \\\
Constant & 0.204*** \\\
 & (0.0117) \\\
 &  \\\
Observations & 275 \\\
Number of loc\_code & 55 \\\
 R-squared & 0.225 \\\ \hline
\multicolumn{2}{c}{ Robust standard errors in parentheses} \\\
\multicolumn{2}{c}{ *** p$<$0.01, ** p$<$0.05, * p$<$0.1} \\\
\end{tabular}
\end{document}
